Source/platform/graphics/GraphicsContextRecorder.h

/*
 * Copyright (C) 2013 Google Inc. All rights reserved.
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 * modification, are permitted provided that the following conditions are
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 * in the documentation and/or other materials provided with the
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 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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#ifndef GraphicsContextRecorder_h
#define GraphicsContextRecorder_h

#include "platform/JSONValues.h"
#include "platform/PlatformExport.h"
#include "platform/graphics/GraphicsContext.h"
#include "third_party/skia/include/core/SkPicture.h"
#include "third_party/skia/include/core/SkPictureRecorder.h"
#include "wtf/RefCounted.h"

namespace blink {

class PLATFORM_EXPORT GraphicsContextSnapshot : public RefCounted<GraphicsContextSnapshot> {
WTF_MAKE_NONCOPYABLE(GraphicsContextSnapshot);
public:
    typedef Vector<Vector<double> > Timings;

    static PassRefPtr<GraphicsContextSnapshot> load(const char*, size_t);

    PassOwnPtr<Vector<char> > replay(unsigned fromStep = 0, unsigned toStep = 0, double scale = 1.0) const;
    PassOwnPtr<Timings> profile(unsigned minIterations, double minDuration) const;
    PassRefPtr<JSONArray> snapshotCommandLog() const;

private:
    friend class GraphicsContextRecorder;
    GraphicsContextSnapshot(PassRefPtr<SkPicture>);

    PassOwnPtr<SkBitmap> createBitmap() const;

    RefPtr<SkPicture> m_picture;
};

class PLATFORM_EXPORT GraphicsContextRecorder {
WTF_MAKE_NONCOPYABLE(GraphicsContextRecorder);
public:
    GraphicsContextRecorder() { }
    GraphicsContext* record(const IntSize&, bool isCertainlyOpaque);
    PassRefPtr<GraphicsContextSnapshot> stop();

private:
    RefPtr<SkPicture> m_picture;
    OwnPtr<GraphicsContext> m_context;
    OwnPtr<SkPictureRecorder> m_recorder;
    bool m_isCertainlyOpaque;
};

} // namespace blink

#endif // GraphicsContextRecorder_h